🕷️ Crawler Inspector

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Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 110 (from laksa016)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa110.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.medicalnewstoday.com/articles/168266\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.medicalnewstoday.com/articles/168266\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.medicalnewstoday.com\/articles\/168266","crawl_time":1775023599,"first_indexed_time":1548477085,"http_code":200,"src_unparsed":"com,medicalnewstoday!www,\/articles\/168266 s443","src_root_hash":"5853625527623639710","history_drop_reason":null,"meta_title":"Fever: Symptoms, treatments, types, and causes","meta_descriptions":["A person has a fever when their temperature is higher than 100°F (38°C). Learn about fever types, symptoms, causes, and treatments in this article."],"attrs_boilerpipe_text":"If an adult’s body temperature rises above the typical range of 98 to 100°F (36 to 38°C), they may have a fever. This is a common sign of an infection.\nWhen an infection occurs, the immune system will launch an attack to try to remove the cause. A high body temperature is sometimes part of this reaction.\nAs a person’s body temperature increases, they may feel cold until it levels off and stops rising. People describe this as “chills.”\nRead on to learn more about the symptoms of a fever, as well as some causes and treatment options.\nA fever is a higher-than-typical body temperature that occurs as part of the immune response. A person\nmay have\na fever if:\ntheir chest or back feels hotter than usual\ntheir skin is\nclammy\nto the touch\nthey feel hot and sweaty,\nshivery and cold\n, or both\nthey have\nflushed\nskin\nDepending on the cause, people may also have other symptoms such as:\nfatigue\na general feeling of being unwell (\nmalaise\n)\na\ncough\na\nstuffy\nor\nrunny\nnose\nFever is distinct from temporary rises in body temperature due to other factors, such as exercise or hot weather.\nPeople can test for fever at home by using a digital thermometer. To\nuse one\n:\nClean the tip using cold water and soap, and then rinse it.\nTurn on the device.\nPlace the tip under the tongue, toward the back of the mouth, and close the mouth.\nWait until there is a flash or the thermometer beeps.\nRead the temperature.\nIf the reading is 100.4°F (38°C) or above, the person may have a fever.\nPeople can also use digital thermometers under the armpit. However, be aware that a typical armpit temperature will be around 0.5 to 0.9ºF (0.3 to 0.5°C) lower than oral temperature.\nEar thermometers are also available, but they can require precise positioning for an accurate result.\nDigital thermometers are one of the safest methods for measuring body temperature at home. Glass thermometers can be dangerous if they break, and forehead strips are not accurate. People should not use these methods.\nIn many cases, the cause of a fever is a\nrespiratory infection\n, such as the flu or\nCOVID-19\n. Most people get better from these infections with rest, fluids, and fever-reducing medications.\nHowever, it is important to take steps to prevent the spread of the infection to protect people who are vulnerable to complications,\nsuch as\nolder adults and pregnant people. If COVID-19 is a possibility, stay home and seek advice about testing.\nSometimes, a fever indicates another type of condition that may require medical treatment. Contact a doctor as soon as possible if a person has a fever along with:\npain anywhere in the body, such as the face, ears, or throat\nswelling anywhere in the body\na wound that is inflamed or leaking pus\nsigns of\nsexually transmitted infection\n, such as unusual\ndischarge from the penis\nor\nvagina\nvomiting or diarrhea\nsymptoms that get progressively worse\nsymptoms that get better but then come back again\nAny adult with a temperature over\n105.8°F (41°C)\nshould get emergency medical attention. This is known as\nhyperpyrexia\n, which can have serious consequences if left untreated.\nPeople should also seek immediate medical treatment if a person has a fever of any temperature along with:\nsunburn\nchest pain\nrapid breathing\ndifficulty breathing\ncoughing up pus or blood\na\nblue\n, gray, or white tint to the lips or fingers\na severe headache\nan aversion to light\na severe or worsening rash\na stiff neck\nconfusion\ndrowsiness\nloss of consciousness\nsigns of severe\ndehydration\n, such as a lack of sweat, saliva, or urine\nseizures or convulsions\nAdditional signs that a child needs immediate medical attention include:\na fever of any temperature in a child\nunder 12 weeks old\na fever of 104\n°\nF (40\n°\nC) or more that does not reduce with medications\na fever that has lasted\n5 days or more\nsunken eyes, a soft spot on top of a baby’s head, or no tears when crying\nA fever occurs when body temperature increases above its usual “set point”. Often, this is because the immune system is fighting a viral, bacterial, or other type of infection.\nOther conditions\nthat affect or activate the immune system can also cause fever, such as:\nautoimmune conditions, such as\nrheumatoid arthritis\nor\nlupus\ninflammatory conditions, such as\nrheumatic fever\nneurogenic fever, which is when a neurological condition, such as\nbrain injury\n, elevates body temperature\ncertain cancers\nsome medications\nIncreases in body temperature from other causes include:\nsunburn\nheat exhaustion\nheatstroke\nsome medications\nA fever is a symptom, not an illness. A doctor can diagnose a fever by checking the person’s body temperature, but they will also need to diagnose the reason for the fever.\nTo do so, they will examine the individual and ask about any other symptoms and their medical history. To confirm a diagnosis, the doctor may recommend:\na blood test\na urine test\nimaging tests\nA fever does not always require treatment. Whether it does depends on its severity and the underlying cause. A doctor may recommend:\nFluids:\nIf a person is\nsweating\na lot, they may experience dehydration. In this case, they should consume\nplenty of fluids\nto prevent complications.\nFever-lowering medications:\nAntipyretics help to lower a person’s temperature. Doctors may recommend these for\na high fever\n, but they are not always necessary. Examples include\nacetaminophen\n(Tylenol),\nibuprofen\n, and\naspirin\n. Do not give aspirin to children. Always consult a doctor or pharmacist before using over-the-counter fever medications.\nAntibiotics:\nIf the fever is due to a\nbacterial infection\n, a doctor may prescribe an antibiotic. This will not work for viral infections, such as\ncolds\nor flu.\nOther drugs:\nDoctors may prescribe different types of medication for some viral,\nfungal\n, or\nparasitic infections\n. For example, they may prescribe antimalarials for\nmalaria\n. Those with chronic conditions, such as\nautoimmune diseases\n, may need ongoing treatment with drugs to reduce the symptoms.\nHospital treatment:\nFor severe infections or symptoms, a person may need hospital treatment. Doctors may provide IV fluids, IV antibiotics, equipment to help a person breathe, or other interventions.\nSometimes, young children with a high temperature have\nfebrile seizures\n. This is most likely to occur between the ages of\n12 and 18 months\n.\nWhile febrile seizures can be alarming, they often result from\nan ear infection\n,\ngastroenteritis\n, or a respiratory virus, and are not usually serious.\nStill, caregivers should seek medical advice if this occurs and remain watchful for any signs of a more serious infection.\nLess commonly, febrile seizures may stem from a more severe illness, such as\nmeningitis\n, a\nkidney infection\n, or pneumonia.\nThere are two types of febrile seizure:\nSimple febrile seizures\nThis type of febrile seizure can last from a few seconds to 15 minutes. However, it usually lasts less than 5 minutes and does not occur again during a 24-hour period. Around\n80% to 85%\nof febrile seizures are of this type.\nA simple febrile seizure typically involves the whole body. The symptoms include:\nstiffness in the body\ntwitching in the arms and legs\neyes rolling back\na loss of consciousness while the eyes stay open\nThere may also be:\nirregular breathing\nurination, defecation, or both\nvomiting\nComplex febrile seizures\nThis type of febrile seizure lasts longer than 15 minutes, comes back more often, and tends to affect only a part of the body, rather than the whole body.\nComplex febrile seizures are more serious than simple febrile seizures. A child who has a complex febrile seizure is more likely to experience\nepilepsy\nas they grow older.\nAround\n30% to 40%\nof children who have either type of seizure will have other similar seizures at a later date.\nWhat to do\nIf a child has a febrile seizure:\nCheck the time\nto determine how long the seizure lasts.\nProtect their head with something soft.\nRemove any potentially dangerous objects from nearby.\nPlace them on their side in the\nrecovery position\nand check that nothing is obstructing their breathing.\nDuring a seizure, do not try to:\nhold the child still\nput anything in their mouth\ngive the child a bath to cool them down\nNext, contact a doctor, call 911, or go to the nearest emergency room. The doctor may suggest managing the child’s temperature with medication and ensuring that the child drinks plenty of fluids.\nTo prevent a fever, people can take steps to avoid getting infections. This includes:\nwashing the hands regularly with soap and water, or using\nhand sanitizer\nif this is not available\nnot touching the face with unwashed hands\ncleaning and disinfecting surfaces regularly\navoiding close contact with people who are unwell\nstaying up-to-date with vaccinations\nA fever is usually a symptom of an infection. It is not usually a cause for concern, but the underlying illness may need medical treatment.\nOften, a fever will resolve without medical attention. However, if a child or an older adult has a fever, if the individual has other severe or worsening symptoms, or if they have\na weakened immune system\n, they should seek medical help.","attrs_markdown":"- Health Conditions\n  Health Conditions\n  \n  - [Alzheimer's & Dementia](https:\/\/www.medicalnewstoday.com\/alzheimers-and-dementia)\n  - [Anxiety](https:\/\/www.medicalnewstoday.com\/anxiety)\n  - [Asthma & Allergies](https:\/\/www.medicalnewstoday.com\/asthma-and-allergies)\n  - [Atopic Dermatitis](https:\/\/www.medicalnewstoday.com\/program\/investigating-atopic-dermatitis)\n  - [Breast Cancer](https:\/\/www.medicalnewstoday.com\/breast-cancer)\n  - [Cancer](https:\/\/www.medicalnewstoday.com\/cancer)\n  - [Cardiovascular Health](https:\/\/www.medicalnewstoday.com\/cardiovascular-health)\n  - [COVID-19](https:\/\/www.medicalnewstoday.com\/coronavirus?correlationId=2b137d5a-dcfb-464e-9ea6-72c5a54b4e92)\n  - [Diabetes](https:\/\/www.medicalnewstoday.com\/diabetes)\n  - [Endometriosis](https:\/\/www.medicalnewstoday.com\/endometriosis)\n  - 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[Who We Are](https:\/\/www.medicalnewstoday.com\/about)\n  - [Our Editorial Process](https:\/\/www.medicalnewstoday.com\/articles\/process)\n  - [Content Integrity](https:\/\/www.medicalnewstoday.com\/about\/content-integrity)\n  - [Conscious Language](https:\/\/www.medicalnewstoday.com\/about\/conscious-language)\n  \n  Find Community\n  \n  - [Bezzy Breast Cancer](https:\/\/www.bezzybc.com\/lp\/2\/?verzenio&utm_source=mnt&utm_medium=nav-bar-connect)\n  - [Bezzy MS](https:\/\/www.bezzyms.com\/?utm_source=mnt&utm_medium=nav-bar-connect)\n  - [Bezzy Migraine](https:\/\/www.bezzymigraine.com\/?utm_source=mnt&utm_medium=nav-bar-connect)\n  - [Bezzy Psoriasis](https:\/\/www.bezzypsoriasis.com\/?utm_source=mnt&utm_medium=nav-bar-connect)\n  \n  Follow Us\n\nSubscribe\n\n# Fever: What you need to know\n![](https:\/\/i0.wp.com\/post.medicalnewstoday.com\/wp-content\/uploads\/2022\/01\/Mia-Armstrong-500x500-Bio.png?w=105&h=105)\n\n[Medically reviewed]() by [Mia Armstrong, MD]() — Written by [Yvette Brazier]() —  [Updated on May 30, 2025]()\n\n- [Signs](https:\/\/www.medicalnewstoday.com\/articles\/168266#signs)\n- [Taking a temperature](https:\/\/www.medicalnewstoday.com\/articles\/168266#taking-a-temperature)\n- [What to do](https:\/\/www.medicalnewstoday.com\/articles\/168266#what-to-do)\n- [When to worry](https:\/\/www.medicalnewstoday.com\/articles\/168266#when-to-worry)\n- [Causes](https:\/\/www.medicalnewstoday.com\/articles\/168266#causes)\n- [Diagnosis](https:\/\/www.medicalnewstoday.com\/articles\/168266#diagnosis)\n- [Treatment](https:\/\/www.medicalnewstoday.com\/articles\/168266#treatment)\n- [In children](https:\/\/www.medicalnewstoday.com\/articles\/168266#in-children)\n- [Prevention](https:\/\/www.medicalnewstoday.com\/articles\/168266#prevention)\n- [Summary](https:\/\/www.medicalnewstoday.com\/articles\/168266#summary)\n\nIf an adult’s body temperature rises above the typical range of 98 to 100°F (36 to 38°C), they may have a fever. This is a common sign of an infection.\n\nWhen an infection occurs, the immune system will launch an attack to try to remove the cause. A high body temperature is sometimes part of this reaction.\n\nAs a person’s body temperature increases, they may feel cold until it levels off and stops rising. People describe this as “chills.”\n\nRead on to learn more about the symptoms of a fever, as well as some causes and treatment options.\n\n## [Signs of a fever]()\n![Man lying in bed with a fever, checking a thermometer and making a phone call](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/sites\/3\/2025\/05\/Man-lying-in-bed-with-a-fever-header-1024x575.jpg)\n\n[Share on Pinterest](https:\/\/www.pinterest.com\/pin\/create\/button\/?url=https%3A%2F%2Fwww.medicalnewstoday.com%2Farticles%2F168266&media=https%3A%2F%2Fmedia.post.rvohealth.io%2Fwp-content%2Fuploads%2Fsites%2F3%2F2025%2F05%2FMan-lying-in-bed-with-a-fever-header-1024x575.jpg&description=Fever%3A%20Symptoms%2C%20treatments%2C%20types%2C%20and%20causes \"Share on Pinterest\")\n\nKathrin Ziegler\/Getty Images\n\nA fever is a higher-than-typical body temperature that occurs as part of the immune response. A person [may have](https:\/\/www.nhs.uk\/conditions\/fever-in-adults\/) a fever if:\n\n- their chest or back feels hotter than usual\n- their skin is [clammy](https:\/\/www.medicalnewstoday.com\/articles\/322446\/) to the touch\n- they feel hot and sweaty, [shivery and cold](https:\/\/www.medicalnewstoday.com\/articles\/chills), or both\n- they have [flushed](https:\/\/www.medicalnewstoday.com\/articles\/323219\/) skin\n\nDepending on the cause, people may also have other symptoms such as:\n\n- fatigue\n- a general feeling of being unwell ([malaise](https:\/\/www.medicalnewstoday.com\/articles\/327062))\n- a [cough](https:\/\/www.medicalnewstoday.com\/articles\/327142)\n- a [stuffy](https:\/\/www.medicalnewstoday.com\/articles\/nasal-congestion\/) or [runny](https:\/\/www.medicalnewstoday.com\/articles\/325248\/) nose\n\nFever is distinct from temporary rises in body temperature due to other factors, such as exercise or hot weather.\n\n## [Taking a temperature]()\nPeople can test for fever at home by using a digital thermometer. To [use one](https:\/\/www.nhs.uk\/common-health-questions\/accidents-first-aid-and-treatments\/how-do-i-take-someones-temperature\/):\n\n1. Clean the tip using cold water and soap, and then rinse it.\n2. Turn on the device.\n3. Place the tip under the tongue, toward the back of the mouth, and close the mouth.\n4. Wait until there is a flash or the thermometer beeps.\n5. Read the temperature.\n\nIf the reading is 100.4°F (38°C) or above, the person may have a fever.\n\nPeople can also use digital thermometers under the armpit. However, be aware that a typical armpit temperature will be around 0.5 to 0.9ºF (0.3 to 0.5°C) lower than oral temperature.\n\nEar thermometers are also available, but they can require precise positioning for an accurate result.\n\nDigital thermometers are one of the safest methods for measuring body temperature at home. Glass thermometers can be dangerous if they break, and forehead strips are not accurate. People should not use these methods.\n\n**»Read more:** [Can you diagnose a fever without a thermometer?](https:\/\/www.medicalnewstoday.com\/articles\/326160)\n\n## [What to do if someone has a fever]()\nIn many cases, the cause of a fever is a [respiratory infection](https:\/\/www.medicalnewstoday.com\/articles\/323886\/), such as the flu or [COVID-19](https:\/\/www.medicalnewstoday.com\/articles\/covid-19). Most people get better from these infections with rest, fluids, and fever-reducing medications.\n\nHowever, it is important to take steps to prevent the spread of the infection to protect people who are vulnerable to complications, [such as](https:\/\/www.cdc.gov\/covid\/risk-factors\/index.html) older adults and pregnant people. If COVID-19 is a possibility, stay home and seek advice about testing.\n\nSometimes, a fever indicates another type of condition that may require medical treatment. Contact a doctor as soon as possible if a person has a fever along with:\n\n- pain anywhere in the body, such as the face, ears, or throat\n- swelling anywhere in the body\n- a wound that is inflamed or leaking pus\n- signs of [sexually transmitted infection](https:\/\/www.medicalnewstoday.com\/articles\/sexually-transmitted-diseases\/), such as unusual [discharge from the penis](https:\/\/www.medicalnewstoday.com\/articles\/327228\/) or [vagina](https:\/\/www.medicalnewstoday.com\/articles\/322232)\n- vomiting or diarrhea\n- symptoms that get progressively worse\n- symptoms that get better but then come back again\n\n## [When should I worry about a fever?]()\nAny adult with a temperature over [105\\.8°F (41°C)](https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK562334\/) should get emergency medical attention. This is known as [hyperpyrexia](https:\/\/www.medicalnewstoday.com\/articles\/318856\/), which can have serious consequences if left untreated.\n\nPeople should also seek immediate medical treatment if a person has a fever of any temperature along with:\n\n- [sunburn](https:\/\/www.medicalnewstoday.com\/articles\/176441)\n- chest pain\n- rapid breathing\n- difficulty breathing\n- coughing up pus or blood\n- a [blue](https:\/\/www.medicalnewstoday.com\/articles\/blue-lips), gray, or white tint to the lips or fingers\n- a severe headache\n- an aversion to light\n- [a severe or worsening rash](https:\/\/www.medicalnewstoday.com\/articles\/324726)\n- [a stiff neck](https:\/\/www.medicalnewstoday.com\/articles\/meningitis-stiff-neck)\n- confusion\n- drowsiness\n- [loss of consciousness](https:\/\/www.medicalnewstoday.com\/articles\/322872\/)\n- signs of severe [dehydration](https:\/\/www.medicalnewstoday.com\/articles\/153363\/), such as a lack of sweat, saliva, or urine\n- seizures or convulsions\n\nAdditional signs that a child needs immediate medical attention include:\n\n- a fever of any temperature in a child\n  [under 12 weeks old](https:\/\/www.cdc.gov\/respiratory-viruses\/risk-factors\/young-children.html)\n- a fever of 104*°*F (40*°*C) or more that does not reduce with medications\n- a fever that has lasted [5 days or more](https:\/\/www.nhs.uk\/conditions\/fever-in-children\/)\n- sunken eyes, a soft spot on top of a baby’s head, or no tears when crying\n\n## [Causes of fever]()\nA fever occurs when body temperature increases above its usual “set point”. Often, this is because the immune system is fighting a viral, bacterial, or other type of infection.\n\n[Other conditions](https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK562334\/) that affect or activate the immune system can also cause fever, such as:\n\n- autoimmune conditions, such as [rheumatoid arthritis](https:\/\/www.medicalnewstoday.com\/articles\/323361\/) or [lupus](https:\/\/www.medicalnewstoday.com\/articles\/323653)\n- inflammatory conditions, such as [rheumatic fever](https:\/\/www.medicalnewstoday.com\/articles\/176648)\n- neurogenic fever, which is when a neurological condition, such as [brain injury](https:\/\/www.medicalnewstoday.com\/articles\/179837\/), elevates body temperature\n- certain cancers\n- some medications\n\nIncreases in body temperature from other causes include:\n\n- sunburn\n- [heat exhaustion](https:\/\/www.medicalnewstoday.com\/articles\/319570)\n- [heatstroke](https:\/\/www.medicalnewstoday.com\/articles\/266551)\n- some medications\n\n**»Learn more:** [What to know about hyperthermia](https:\/\/www.medicalnewstoday.com\/articles\/320226)\n\n## [Diagnosis]()\nA fever is a symptom, not an illness. A doctor can diagnose a fever by checking the person’s body temperature, but they will also need to diagnose the reason for the fever.\n\nTo do so, they will examine the individual and ask about any other symptoms and their medical history. To confirm a diagnosis, the doctor may recommend:\n\n- a blood test\n- a urine test\n- imaging tests\n\n## [Treatment for a fever]()\nA fever does not always require treatment. Whether it does depends on its severity and the underlying cause. A doctor may recommend:\n\n- **Fluids:** If a person is [sweating](https:\/\/www.medicalnewstoday.com\/articles\/321663\/) a lot, they may experience dehydration. In this case, they should consume [plenty of fluids](https:\/\/www.medicalnewstoday.com\/articles\/306638\/) to prevent complications.\n- **Fever-lowering medications:** Antipyretics help to lower a person’s temperature. Doctors may recommend these for [a high fever](https:\/\/www.medicalnewstoday.com\/articles\/318856\/), but they are not always necessary. Examples include [acetaminophen](https:\/\/www.medicalnewstoday.com\/articles\/drugs-acetaminophen-oral-forms) (Tylenol), [ibuprofen](https:\/\/www.medicalnewstoday.com\/articles\/161071), and [aspirin](https:\/\/www.medicalnewstoday.com\/articles\/161255). Do not give aspirin to children. Always consult a doctor or pharmacist before using over-the-counter fever medications.\n- **Antibiotics:** If the fever is due to a [bacterial infection](https:\/\/www.medicalnewstoday.com\/articles\/157973\/), a doctor may prescribe an antibiotic. This will not work for viral infections, such as [colds](https:\/\/www.medicalnewstoday.com\/articles\/166606\/) or flu.\n- **Other drugs:** Doctors may prescribe different types of medication for some viral, [fungal](https:\/\/www.medicalnewstoday.com\/articles\/317970\/), or [parasitic infections](https:\/\/www.medicalnewstoday.com\/articles\/220302\/). For example, they may prescribe antimalarials for [malaria](https:\/\/www.medicalnewstoday.com\/articles\/150670\/). Those with chronic conditions, such as [autoimmune diseases](https:\/\/www.medicalnewstoday.com\/articles\/311852\/), may need ongoing treatment with drugs to reduce the symptoms.\n- **Hospital treatment:** For severe infections or symptoms, a person may need hospital treatment. Doctors may provide IV fluids, IV antibiotics, equipment to help a person breathe, or other interventions.\n\n## [Fever in children]()\nSometimes, young children with a high temperature have [febrile seizures](https:\/\/www.medicalnewstoday.com\/articles\/168010\/). This is most likely to occur between the ages of [12 and 18 months](https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC6052913\/).\n\nWhile febrile seizures can be alarming, they often result from [an ear infection](https:\/\/www.medicalnewstoday.com\/articles\/167409\/), [gastroenteritis](https:\/\/www.medicalnewstoday.com\/articles\/310481\/), or a respiratory virus, and are not usually serious.\n\nStill, caregivers should seek medical advice if this occurs and remain watchful for any signs of a more serious infection.\n\nLess commonly, febrile seizures may stem from a more severe illness, such as [meningitis](https:\/\/www.medicalnewstoday.com\/articles\/types-of-meningitis\/), a [kidney infection](https:\/\/www.medicalnewstoday.com\/articles\/182306\/), or pneumonia.\n\nThere are two types of febrile seizure:\n\n### Simple febrile seizures\nThis type of febrile seizure can last from a few seconds to 15 minutes. However, it usually lasts less than 5 minutes and does not occur again during a 24-hour period. Around [80% to 85%](https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC6052913\/) of febrile seizures are of this type.\n\nA simple febrile seizure typically involves the whole body. The symptoms include:\n\n- stiffness in the body\n- twitching in the arms and legs\n- eyes rolling back\n- a loss of consciousness while the eyes stay open\n\nThere may also be:\n\n- irregular breathing\n- urination, defecation, or both\n- vomiting\n### Complex febrile seizures\nThis type of febrile seizure lasts longer than 15 minutes, comes back more often, and tends to affect only a part of the body, rather than the whole body.\n\nComplex febrile seizures are more serious than simple febrile seizures. A child who has a complex febrile seizure is more likely to experience [epilepsy](https:\/\/www.medicalnewstoday.com\/articles\/8947\/) as they grow older.\n\nAround [30% to 40%](https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC6052913\/) of children who have either type of seizure will have other similar seizures at a later date.\n\n### What to do\nIf a child has a febrile seizure:\n\n1. [Check the time](https:\/\/www.nhs.uk\/conditions\/febrile-seizures\/) to determine how long the seizure lasts.\n2. Protect their head with something soft.\n3. Remove any potentially dangerous objects from nearby.\n4. Place them on their side in the [recovery position](https:\/\/www.medicalnewstoday.com\/articles\/153849) and check that nothing is obstructing their breathing.\n\nDuring a seizure, do not try to:\n\n- hold the child still\n- put anything in their mouth\n- give the child a bath to cool them down\n\nNext, contact a doctor, call 911, or go to the nearest emergency room. The doctor may suggest managing the child’s temperature with medication and ensuring that the child drinks plenty of fluids.\n\n## [Fever prevention]()\nTo prevent a fever, people can take steps to avoid getting infections. This includes:\n\n- washing the hands regularly with soap and water, or using [hand sanitizer](https:\/\/www.medicalnewstoday.com\/articles\/ethanol-hand-sanitizer\/) if this is not available\n- not touching the face with unwashed hands\n- cleaning and disinfecting surfaces regularly\n- avoiding close contact with people who are unwell\n- staying up-to-date with vaccinations\n\n## [Summary]()\nA fever is usually a symptom of an infection. It is not usually a cause for concern, but the underlying illness may need medical treatment.\n\nOften, a fever will resolve without medical attention. However, if a child or an older adult has a fever, if the individual has other severe or worsening symptoms, or if they have [a weakened immune system](https:\/\/www.medicalnewstoday.com\/articles\/324930\/), they should seek medical help.\n\n[Read the article in Spanish](https:\/\/www.medicalnewstoday.com\/articles\/es\/fiebre).\n\n- [Public Health](https:\/\/www.medicalnewstoday.com\/categories\/public-health)\n- [Infectious Diseases \/ Bacteria \/ Viruses](https:\/\/www.medicalnewstoday.com\/categories\/infectious_diseases)\n- [Pediatrics \/ Children's Health](https:\/\/www.medicalnewstoday.com\/categories\/pediatrics)\n\n### How we reviewed this article:\nSources\n\nMedical News Today has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical journals and associations. We only use quality, credible sources to ensure content accuracy and integrity. You can learn more about how we ensure our content is accurate and current by reading our [editorial policy](https:\/\/www.medicalnewstoday.com\/articles\/process).\n\n- Balli S, et al. (2023). Physiology, fever.  \n  <https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK562334\/>\n- Febrile seizures. (2023).  \n  <https:\/\/www.nhs.uk\/conditions\/febrile-seizures\/>\n- High temperature (fever) in adults. (2023).  \n  <https:\/\/www.nhs.uk\/conditions\/fever-in-adults\/>\n- High temperature (fever) in children. (2024).  \n  <https:\/\/www.nhs.uk\/conditions\/fever-in-children\/>\n- Leung AKC, et al. (2018). Febrile seizures: An overview.  \n  <https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC6052913\/>\n- People with certain medical conditions and COVID-19 risk factors. (2025).  \n  <https:\/\/www.cdc.gov\/covid\/risk-factors\/index.html>\n- Respiratory viruses and young children. (2024).  \n  <https:\/\/www.cdc.gov\/respiratory-viruses\/risk-factors\/young-children.html>\n\nShare this article\n\n![](https:\/\/i0.wp.com\/post.medicalnewstoday.com\/wp-content\/uploads\/2022\/01\/Mia-Armstrong-500x500-Bio.png?w=105&h=105)\n\n[Medically reviewed]() by [Mia Armstrong, MD]() — Written by [Yvette Brazier]() —  [Updated on May 30, 2025]()\n\n## Latest news\n- [9 steps to improve heart health, per new dietary guidance from AHA](https:\/\/www.medicalnewstoday.com\/articles\/9-steps-improve-heart-health-diet-guidance-aha)\n- [AI model can accurately predict liver cancer risk, study suggests](https:\/\/www.medicalnewstoday.com\/articles\/ai-model-accurately-predict-liver-cancer-risk)\n- [AI-powered stroke tool linked to improved patient outcomes in large clinical trial](https:\/\/www.medicalnewstoday.com\/articles\/ai-powered-stroke-tool-linked-improved-patient-outcomes-large-clinical-trial)\n- [Eating same meals on repeat, and more at weekends may help you lose more weight](https:\/\/www.medicalnewstoday.com\/articles\/eating-same-meals-repeat-more-weekends-may-help-lose-more-weight)\n- [Cooking at least one meal at home weekly may cut dementia risk by up to 67%](https:\/\/www.medicalnewstoday.com\/articles\/cooking-at-least-one-meal-at-home-weekly-may-cut-dementia-risk)\n\n© 2026 Healthline Media UK Ltd, London, UK. All rights reserved. MNT is the registered trade mark of Healthline Media. Healthline Media is an RVO Health Company. Any medical information published on this website is not intended as a substitute for informed medical advice and you should not take any action before consulting with a healthcare professional. [See additional information](https:\/\/www.medicalnewstoday.com\/about\/additional-information).\n\n- [About Us](https:\/\/www.medicalnewstoday.com\/about)\n- [Contact Us](https:\/\/www.medicalnewstoday.com\/about\/contact-us)\n- [Terms of Use](https:\/\/www.medicalnewstoday.com\/about\/terms-of-use)\n- [Privacy Policy](https:\/\/www.medicalnewstoday.com\/about\/privacy-policy)\n- Privacy Settings\n- [Advertising Policy](https:\/\/www.medicalnewstoday.com\/ad-policy)\n\n- [Health Topics](https:\/\/www.medicalnewstoday.com\/directory\/a-b)\n- [Health Hubs](https:\/\/www.medicalnewstoday.com\/articles\/content-hubs)\n- [Medical Affairs](https:\/\/www.medicalnewstoday.com\/about\/reviewers)\n- [Content Integrity](https:\/\/www.medicalnewstoday.com\/about\/content-integrity)\n- [Newsletters](https:\/\/www.medicalnewstoday.com\/newsletter)\n- © 2026 Healthline Media UK Ltd, London, UK. All rights reserved. MNT is the registered trade mark of Healthline Media. Healthline Media is an RVO Health Company. Any medical information published on this website is not intended as a substitute for informed medical advice and you should not take any action before consulting with a healthcare professional. [See additional information](https:\/\/www.medicalnewstoday.com\/about\/additional-information).\n\n© 2026 Healthline Media UK Ltd, London, UK. All rights reserved. MNT is the registered trade mark of Healthline Media. Healthline Media is an RVO Health Company. Any medical information published on this website is not intended as a substitute for informed medical advice and you should not take any action before consulting with a healthcare professional. [See additional information](https:\/\/www.medicalnewstoday.com\/about\/additional-information).\n\n[About](https:\/\/www.healthlinemedia.com\/?utm_source=medicalnewstoday.com&utm_medium=site&utm_campaign=footer&utm_content=about)[Careers](https:\/\/rvohealth.com\/careers)[Advertise with us](https:\/\/www.healthlinemedia.com\/advertise?utm_source=medicalnewstoday.com&utm_medium=site&utm_campaign=footer&utm_content=advertise)\n\nOUR BRANDS\n\n[Healthline](https:\/\/www.healthline.com\/)[Medical News Today](https:\/\/www.medicalnewstoday.com\/)[Greatist](https:\/\/greatist.com\/)[Psych Central](https:\/\/psychcentral.com\/)[Bezzy](https:\/\/bezzy.com\/)\n\n![](http:\/\/b.scorecardresearch.com\/p?c1=2&c2=38584006&cv=3.9&cj=1&comscorekw=main)","attrs_readable_markdown":"If an adult’s body temperature rises above the typical range of 98 to 100°F (36 to 38°C), they may have a fever. This is a common sign of an infection.\n\nWhen an infection occurs, the immune system will launch an attack to try to remove the cause. A high body temperature is sometimes part of this reaction.\n\nAs a person’s body temperature increases, they may feel cold until it levels off and stops rising. People describe this as “chills.”\n\nRead on to learn more about the symptoms of a fever, as well as some causes and treatment options.\n\nA fever is a higher-than-typical body temperature that occurs as part of the immune response. A person [may have](https:\/\/www.nhs.uk\/conditions\/fever-in-adults\/) a fever if:\n\n- their chest or back feels hotter than usual\n- their skin is [clammy](https:\/\/www.medicalnewstoday.com\/articles\/322446\/) to the touch\n- they feel hot and sweaty, [shivery and cold](https:\/\/www.medicalnewstoday.com\/articles\/chills), or both\n- they have [flushed](https:\/\/www.medicalnewstoday.com\/articles\/323219\/) skin\n\nDepending on the cause, people may also have other symptoms such as:\n\n- fatigue\n- a general feeling of being unwell ([malaise](https:\/\/www.medicalnewstoday.com\/articles\/327062))\n- a [cough](https:\/\/www.medicalnewstoday.com\/articles\/327142)\n- a [stuffy](https:\/\/www.medicalnewstoday.com\/articles\/nasal-congestion\/) or [runny](https:\/\/www.medicalnewstoday.com\/articles\/325248\/) nose\n\nFever is distinct from temporary rises in body temperature due to other factors, such as exercise or hot weather.\n\nPeople can test for fever at home by using a digital thermometer. To [use one](https:\/\/www.nhs.uk\/common-health-questions\/accidents-first-aid-and-treatments\/how-do-i-take-someones-temperature\/):\n\n1. Clean the tip using cold water and soap, and then rinse it.\n2. Turn on the device.\n3. Place the tip under the tongue, toward the back of the mouth, and close the mouth.\n4. Wait until there is a flash or the thermometer beeps.\n5. Read the temperature.\n\nIf the reading is 100.4°F (38°C) or above, the person may have a fever.\n\nPeople can also use digital thermometers under the armpit. However, be aware that a typical armpit temperature will be around 0.5 to 0.9ºF (0.3 to 0.5°C) lower than oral temperature.\n\nEar thermometers are also available, but they can require precise positioning for an accurate result.\n\nDigital thermometers are one of the safest methods for measuring body temperature at home. Glass thermometers can be dangerous if they break, and forehead strips are not accurate. People should not use these methods.\n\nIn many cases, the cause of a fever is a [respiratory infection](https:\/\/www.medicalnewstoday.com\/articles\/323886\/), such as the flu or [COVID-19](https:\/\/www.medicalnewstoday.com\/articles\/covid-19). Most people get better from these infections with rest, fluids, and fever-reducing medications.\n\nHowever, it is important to take steps to prevent the spread of the infection to protect people who are vulnerable to complications, [such as](https:\/\/www.cdc.gov\/covid\/risk-factors\/index.html) older adults and pregnant people. If COVID-19 is a possibility, stay home and seek advice about testing.\n\nSometimes, a fever indicates another type of condition that may require medical treatment. Contact a doctor as soon as possible if a person has a fever along with:\n\n- pain anywhere in the body, such as the face, ears, or throat\n- swelling anywhere in the body\n- a wound that is inflamed or leaking pus\n- signs of [sexually transmitted infection](https:\/\/www.medicalnewstoday.com\/articles\/sexually-transmitted-diseases\/), such as unusual [discharge from the penis](https:\/\/www.medicalnewstoday.com\/articles\/327228\/) or [vagina](https:\/\/www.medicalnewstoday.com\/articles\/322232)\n- vomiting or diarrhea\n- symptoms that get progressively worse\n- symptoms that get better but then come back again\n\nAny adult with a temperature over [105\\.8°F (41°C)](https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK562334\/) should get emergency medical attention. This is known as [hyperpyrexia](https:\/\/www.medicalnewstoday.com\/articles\/318856\/), which can have serious consequences if left untreated.\n\nPeople should also seek immediate medical treatment if a person has a fever of any temperature along with:\n\n- [sunburn](https:\/\/www.medicalnewstoday.com\/articles\/176441)\n- chest pain\n- rapid breathing\n- difficulty breathing\n- coughing up pus or blood\n- a [blue](https:\/\/www.medicalnewstoday.com\/articles\/blue-lips), gray, or white tint to the lips or fingers\n- a severe headache\n- an aversion to light\n- [a severe or worsening rash](https:\/\/www.medicalnewstoday.com\/articles\/324726)\n- [a stiff neck](https:\/\/www.medicalnewstoday.com\/articles\/meningitis-stiff-neck)\n- confusion\n- drowsiness\n- [loss of consciousness](https:\/\/www.medicalnewstoday.com\/articles\/322872\/)\n- signs of severe [dehydration](https:\/\/www.medicalnewstoday.com\/articles\/153363\/), such as a lack of sweat, saliva, or urine\n- seizures or convulsions\n\nAdditional signs that a child needs immediate medical attention include:\n\n- a fever of any temperature in a child\n  [under 12 weeks old](https:\/\/www.cdc.gov\/respiratory-viruses\/risk-factors\/young-children.html)\n- a fever of 104*°*F (40*°*C) or more that does not reduce with medications\n- a fever that has lasted [5 days or more](https:\/\/www.nhs.uk\/conditions\/fever-in-children\/)\n- sunken eyes, a soft spot on top of a baby’s head, or no tears when crying\n\nA fever occurs when body temperature increases above its usual “set point”. Often, this is because the immune system is fighting a viral, bacterial, or other type of infection.\n\n[Other conditions](https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK562334\/) that affect or activate the immune system can also cause fever, such as:\n\n- autoimmune conditions, such as [rheumatoid arthritis](https:\/\/www.medicalnewstoday.com\/articles\/323361\/) or [lupus](https:\/\/www.medicalnewstoday.com\/articles\/323653)\n- inflammatory conditions, such as [rheumatic fever](https:\/\/www.medicalnewstoday.com\/articles\/176648)\n- neurogenic fever, which is when a neurological condition, such as [brain injury](https:\/\/www.medicalnewstoday.com\/articles\/179837\/), elevates body temperature\n- certain cancers\n- some medications\n\nIncreases in body temperature from other causes include:\n\n- sunburn\n- [heat exhaustion](https:\/\/www.medicalnewstoday.com\/articles\/319570)\n- [heatstroke](https:\/\/www.medicalnewstoday.com\/articles\/266551)\n- some medications\n\nA fever is a symptom, not an illness. A doctor can diagnose a fever by checking the person’s body temperature, but they will also need to diagnose the reason for the fever.\n\nTo do so, they will examine the individual and ask about any other symptoms and their medical history. To confirm a diagnosis, the doctor may recommend:\n\n- a blood test\n- a urine test\n- imaging tests\n\nA fever does not always require treatment. Whether it does depends on its severity and the underlying cause. A doctor may recommend:\n\n- **Fluids:** If a person is [sweating](https:\/\/www.medicalnewstoday.com\/articles\/321663\/) a lot, they may experience dehydration. In this case, they should consume [plenty of fluids](https:\/\/www.medicalnewstoday.com\/articles\/306638\/) to prevent complications.\n- **Fever-lowering medications:** Antipyretics help to lower a person’s temperature. Doctors may recommend these for [a high fever](https:\/\/www.medicalnewstoday.com\/articles\/318856\/), but they are not always necessary. Examples include [acetaminophen](https:\/\/www.medicalnewstoday.com\/articles\/drugs-acetaminophen-oral-forms) (Tylenol), [ibuprofen](https:\/\/www.medicalnewstoday.com\/articles\/161071), and [aspirin](https:\/\/www.medicalnewstoday.com\/articles\/161255). Do not give aspirin to children. Always consult a doctor or pharmacist before using over-the-counter fever medications.\n- **Antibiotics:** If the fever is due to a [bacterial infection](https:\/\/www.medicalnewstoday.com\/articles\/157973\/), a doctor may prescribe an antibiotic. This will not work for viral infections, such as [colds](https:\/\/www.medicalnewstoday.com\/articles\/166606\/) or flu.\n- **Other drugs:** Doctors may prescribe different types of medication for some viral, [fungal](https:\/\/www.medicalnewstoday.com\/articles\/317970\/), or [parasitic infections](https:\/\/www.medicalnewstoday.com\/articles\/220302\/). For example, they may prescribe antimalarials for [malaria](https:\/\/www.medicalnewstoday.com\/articles\/150670\/). Those with chronic conditions, such as [autoimmune diseases](https:\/\/www.medicalnewstoday.com\/articles\/311852\/), may need ongoing treatment with drugs to reduce the symptoms.\n- **Hospital treatment:** For severe infections or symptoms, a person may need hospital treatment. Doctors may provide IV fluids, IV antibiotics, equipment to help a person breathe, or other interventions.\n\nSometimes, young children with a high temperature have [febrile seizures](https:\/\/www.medicalnewstoday.com\/articles\/168010\/). This is most likely to occur between the ages of [12 and 18 months](https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC6052913\/).\n\nWhile febrile seizures can be alarming, they often result from [an ear infection](https:\/\/www.medicalnewstoday.com\/articles\/167409\/), [gastroenteritis](https:\/\/www.medicalnewstoday.com\/articles\/310481\/), or a respiratory virus, and are not usually serious.\n\nStill, caregivers should seek medical advice if this occurs and remain watchful for any signs of a more serious infection.\n\nLess commonly, febrile seizures may stem from a more severe illness, such as [meningitis](https:\/\/www.medicalnewstoday.com\/articles\/types-of-meningitis\/), a [kidney infection](https:\/\/www.medicalnewstoday.com\/articles\/182306\/), or pneumonia.\n\nThere are two types of febrile seizure:\n\nSimple febrile seizures\n\nThis type of febrile seizure can last from a few seconds to 15 minutes. However, it usually lasts less than 5 minutes and does not occur again during a 24-hour period. Around [80% to 85%](https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC6052913\/) of febrile seizures are of this type.\n\nA simple febrile seizure typically involves the whole body. The symptoms include:\n\n- stiffness in the body\n- twitching in the arms and legs\n- eyes rolling back\n- a loss of consciousness while the eyes stay open\n\nThere may also be:\n\n- irregular breathing\n- urination, defecation, or both\n- vomiting\n\nComplex febrile seizures\n\nThis type of febrile seizure lasts longer than 15 minutes, comes back more often, and tends to affect only a part of the body, rather than the whole body.\n\nComplex febrile seizures are more serious than simple febrile seizures. A child who has a complex febrile seizure is more likely to experience [epilepsy](https:\/\/www.medicalnewstoday.com\/articles\/8947\/) as they grow older.\n\nAround [30% to 40%](https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC6052913\/) of children who have either type of seizure will have other similar seizures at a later date.\n\nWhat to do\n\nIf a child has a febrile seizure:\n\n1. [Check the time](https:\/\/www.nhs.uk\/conditions\/febrile-seizures\/) to determine how long the seizure lasts.\n2. Protect their head with something soft.\n3. Remove any potentially dangerous objects from nearby.\n4. Place them on their side in the [recovery position](https:\/\/www.medicalnewstoday.com\/articles\/153849) and check that nothing is obstructing their breathing.\n\nDuring a seizure, do not try to:\n\n- hold the child still\n- put anything in their mouth\n- give the child a bath to cool them down\n\nNext, contact a doctor, call 911, or go to the nearest emergency room. The doctor may suggest managing the child’s temperature with medication and ensuring that the child drinks plenty of fluids.\n\nTo prevent a fever, people can take steps to avoid getting infections. This includes:\n\n- washing the hands regularly with soap and water, or using [hand sanitizer](https:\/\/www.medicalnewstoday.com\/articles\/ethanol-hand-sanitizer\/) if this is not available\n- not touching the face with unwashed hands\n- cleaning and disinfecting surfaces regularly\n- avoiding close contact with people who are unwell\n- staying up-to-date with vaccinations\n\nA fever is usually a symptom of an infection. It is not usually a cause for concern, but the underlying illness may need medical treatment.\n\nOften, a fever will resolve without medical attention. However, if a child or an older adult has a fever, if the individual has other severe or worsening symptoms, or if they have [a weakened immune system](https:\/\/www.medicalnewstoday.com\/articles\/324930\/), they should seek medical help.","meta_canonical":null}

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URL	https://www.medicalnewstoday.com/articles/168266
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Meta Title	Fever: Symptoms, treatments, types, and causes
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Boilerpipe Text	If an adult’s body temperature rises above the typical range of 98 to 100°F (36 to 38°C), they may have a fever. This is a common sign of an infection. When an infection occurs, the immune system will launch an attack to try to remove the cause. A high body temperature is sometimes part of this reaction. As a person’s body temperature increases, they may feel cold until it levels off and stops rising. People describe this as “chills.” Read on to learn more about the symptoms of a fever, as well as some causes and treatment options. A fever is a higher-than-typical body temperature that occurs as part of the immune response. A person may have a fever if: their chest or back feels hotter than usual their skin is clammy to the touch they feel hot and sweaty, shivery and cold , or both they have flushed skin Depending on the cause, people may also have other symptoms such as: fatigue a general feeling of being unwell ( malaise ) a cough a stuffy or runny nose Fever is distinct from temporary rises in body temperature due to other factors, such as exercise or hot weather. People can test for fever at home by using a digital thermometer. To use one : Clean the tip using cold water and soap, and then rinse it. Turn on the device. Place the tip under the tongue, toward the back of the mouth, and close the mouth. Wait until there is a flash or the thermometer beeps. Read the temperature. If the reading is 100.4°F (38°C) or above, the person may have a fever. People can also use digital thermometers under the armpit. However, be aware that a typical armpit temperature will be around 0.5 to 0.9ºF (0.3 to 0.5°C) lower than oral temperature. Ear thermometers are also available, but they can require precise positioning for an accurate result. Digital thermometers are one of the safest methods for measuring body temperature at home. Glass thermometers can be dangerous if they break, and forehead strips are not accurate. People should not use these methods. In many cases, the cause of a fever is a respiratory infection , such as the flu or COVID-19 . Most people get better from these infections with rest, fluids, and fever-reducing medications. However, it is important to take steps to prevent the spread of the infection to protect people who are vulnerable to complications, such as older adults and pregnant people. If COVID-19 is a possibility, stay home and seek advice about testing. Sometimes, a fever indicates another type of condition that may require medical treatment. Contact a doctor as soon as possible if a person has a fever along with: pain anywhere in the body, such as the face, ears, or throat swelling anywhere in the body a wound that is inflamed or leaking pus signs of sexually transmitted infection , such as unusual discharge from the penis or vagina vomiting or diarrhea symptoms that get progressively worse symptoms that get better but then come back again Any adult with a temperature over 105.8°F (41°C) should get emergency medical attention. This is known as hyperpyrexia , which can have serious consequences if left untreated. People should also seek immediate medical treatment if a person has a fever of any temperature along with: sunburn chest pain rapid breathing difficulty breathing coughing up pus or blood a blue , gray, or white tint to the lips or fingers a severe headache an aversion to light a severe or worsening rash a stiff neck confusion drowsiness loss of consciousness signs of severe dehydration , such as a lack of sweat, saliva, or urine seizures or convulsions Additional signs that a child needs immediate medical attention include: a fever of any temperature in a child under 12 weeks old a fever of 104 ° F (40 ° C) or more that does not reduce with medications a fever that has lasted 5 days or more sunken eyes, a soft spot on top of a baby’s head, or no tears when crying A fever occurs when body temperature increases above its usual “set point”. Often, this is because the immune system is fighting a viral, bacterial, or other type of infection. Other conditions that affect or activate the immune system can also cause fever, such as: autoimmune conditions, such as rheumatoid arthritis or lupus inflammatory conditions, such as rheumatic fever neurogenic fever, which is when a neurological condition, such as brain injury , elevates body temperature certain cancers some medications Increases in body temperature from other causes include: sunburn heat exhaustion heatstroke some medications A fever is a symptom, not an illness. A doctor can diagnose a fever by checking the person’s body temperature, but they will also need to diagnose the reason for the fever. To do so, they will examine the individual and ask about any other symptoms and their medical history. To confirm a diagnosis, the doctor may recommend: a blood test a urine test imaging tests A fever does not always require treatment. Whether it does depends on its severity and the underlying cause. A doctor may recommend: Fluids: If a person is sweating a lot, they may experience dehydration. In this case, they should consume plenty of fluids to prevent complications. Fever-lowering medications: Antipyretics help to lower a person’s temperature. Doctors may recommend these for a high fever , but they are not always necessary. Examples include acetaminophen (Tylenol), ibuprofen , and aspirin . Do not give aspirin to children. Always consult a doctor or pharmacist before using over-the-counter fever medications. Antibiotics: If the fever is due to a bacterial infection , a doctor may prescribe an antibiotic. This will not work for viral infections, such as colds or flu. Other drugs: Doctors may prescribe different types of medication for some viral, fungal , or parasitic infections . For example, they may prescribe antimalarials for malaria . Those with chronic conditions, such as autoimmune diseases , may need ongoing treatment with drugs to reduce the symptoms. Hospital treatment: For severe infections or symptoms, a person may need hospital treatment. Doctors may provide IV fluids, IV antibiotics, equipment to help a person breathe, or other interventions. Sometimes, young children with a high temperature have febrile seizures . This is most likely to occur between the ages of 12 and 18 months . While febrile seizures can be alarming, they often result from an ear infection , gastroenteritis , or a respiratory virus, and are not usually serious. Still, caregivers should seek medical advice if this occurs and remain watchful for any signs of a more serious infection. Less commonly, febrile seizures may stem from a more severe illness, such as meningitis , a kidney infection , or pneumonia. There are two types of febrile seizure: Simple febrile seizures This type of febrile seizure can last from a few seconds to 15 minutes. However, it usually lasts less than 5 minutes and does not occur again during a 24-hour period. Around 80% to 85% of febrile seizures are of this type. A simple febrile seizure typically involves the whole body. The symptoms include: stiffness in the body twitching in the arms and legs eyes rolling back a loss of consciousness while the eyes stay open There may also be: irregular breathing urination, defecation, or both vomiting Complex febrile seizures This type of febrile seizure lasts longer than 15 minutes, comes back more often, and tends to affect only a part of the body, rather than the whole body. Complex febrile seizures are more serious than simple febrile seizures. A child who has a complex febrile seizure is more likely to experience epilepsy as they grow older. Around 30% to 40% of children who have either type of seizure will have other similar seizures at a later date. What to do If a child has a febrile seizure: Check the time to determine how long the seizure lasts. Protect their head with something soft. Remove any potentially dangerous objects from nearby. Place them on their side in the recovery position and check that nothing is obstructing their breathing. During a seizure, do not try to: hold the child still put anything in their mouth give the child a bath to cool them down Next, contact a doctor, call 911, or go to the nearest emergency room. The doctor may suggest managing the child’s temperature with medication and ensuring that the child drinks plenty of fluids. To prevent a fever, people can take steps to avoid getting infections. This includes: washing the hands regularly with soap and water, or using hand sanitizer if this is not available not touching the face with unwashed hands cleaning and disinfecting surfaces regularly avoiding close contact with people who are unwell staying up-to-date with vaccinations A fever is usually a symptom of an infection. It is not usually a cause for concern, but the underlying illness may need medical treatment. Often, a fever will resolve without medical attention. However, if a child or an older adult has a fever, if the individual has other severe or worsening symptoms, or if they have a weakened immune system , they should seek medical help.
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[Bezzy Psoriasis](https://www.bezzypsoriasis.com/?utm_source=mnt&utm_medium=nav-bar-connect) Follow Us Subscribe # Fever: What you need to know ![](https://i0.wp.com/post.medicalnewstoday.com/wp-content/uploads/2022/01/Mia-Armstrong-500x500-Bio.png?w=105&h=105) [Medically reviewed]() by [Mia Armstrong, MD]() — Written by [Yvette Brazier]() — [Updated on May 30, 2025]() - [Signs](https://www.medicalnewstoday.com/articles/168266#signs) - [Taking a temperature](https://www.medicalnewstoday.com/articles/168266#taking-a-temperature) - [What to do](https://www.medicalnewstoday.com/articles/168266#what-to-do) - [When to worry](https://www.medicalnewstoday.com/articles/168266#when-to-worry) - [Causes](https://www.medicalnewstoday.com/articles/168266#causes) - [Diagnosis](https://www.medicalnewstoday.com/articles/168266#diagnosis) - [Treatment](https://www.medicalnewstoday.com/articles/168266#treatment) - [In children](https://www.medicalnewstoday.com/articles/168266#in-children) - [Prevention](https://www.medicalnewstoday.com/articles/168266#prevention) - [Summary](https://www.medicalnewstoday.com/articles/168266#summary) If an adult’s body temperature rises above the typical range of 98 to 100°F (36 to 38°C), they may have a fever. This is a common sign of an infection. When an infection occurs, the immune system will launch an attack to try to remove the cause. A high body temperature is sometimes part of this reaction. As a person’s body temperature increases, they may feel cold until it levels off and stops rising. People describe this as “chills.” Read on to learn more about the symptoms of a fever, as well as some causes and treatment options. ## [Signs of a fever]() ![Man lying in bed with a fever, checking a thermometer and making a phone call](https://media.post.rvohealth.io/wp-content/uploads/sites/3/2025/05/Man-lying-in-bed-with-a-fever-header-1024x575.jpg) [Share on Pinterest](https://www.pinterest.com/pin/create/button/?url=https%3A%2F%2Fwww.medicalnewstoday.com%2Farticles%2F168266&media=https%3A%2F%2Fmedia.post.rvohealth.io%2Fwp-content%2Fuploads%2Fsites%2F3%2F2025%2F05%2FMan-lying-in-bed-with-a-fever-header-1024x575.jpg&description=Fever%3A%20Symptoms%2C%20treatments%2C%20types%2C%20and%20causes "Share on Pinterest") Kathrin Ziegler/Getty Images A fever is a higher-than-typical body temperature that occurs as part of the immune response. A person [may have](https://www.nhs.uk/conditions/fever-in-adults/) a fever if: - their chest or back feels hotter than usual - their skin is [clammy](https://www.medicalnewstoday.com/articles/322446/) to the touch - they feel hot and sweaty, [shivery and cold](https://www.medicalnewstoday.com/articles/chills), or both - they have [flushed](https://www.medicalnewstoday.com/articles/323219/) skin Depending on the cause, people may also have other symptoms such as: - fatigue - a general feeling of being unwell ([malaise](https://www.medicalnewstoday.com/articles/327062)) - a [cough](https://www.medicalnewstoday.com/articles/327142) - a [stuffy](https://www.medicalnewstoday.com/articles/nasal-congestion/) or [runny](https://www.medicalnewstoday.com/articles/325248/) nose Fever is distinct from temporary rises in body temperature due to other factors, such as exercise or hot weather. ## [Taking a temperature]() People can test for fever at home by using a digital thermometer. To [use one](https://www.nhs.uk/common-health-questions/accidents-first-aid-and-treatments/how-do-i-take-someones-temperature/): 1. Clean the tip using cold water and soap, and then rinse it. 2. Turn on the device. 3. Place the tip under the tongue, toward the back of the mouth, and close the mouth. 4. Wait until there is a flash or the thermometer beeps. 5. Read the temperature. If the reading is 100.4°F (38°C) or above, the person may have a fever. People can also use digital thermometers under the armpit. However, be aware that a typical armpit temperature will be around 0.5 to 0.9ºF (0.3 to 0.5°C) lower than oral temperature. Ear thermometers are also available, but they can require precise positioning for an accurate result. Digital thermometers are one of the safest methods for measuring body temperature at home. Glass thermometers can be dangerous if they break, and forehead strips are not accurate. People should not use these methods. »Read more: [Can you diagnose a fever without a thermometer?](https://www.medicalnewstoday.com/articles/326160) ## [What to do if someone has a fever]() In many cases, the cause of a fever is a [respiratory infection](https://www.medicalnewstoday.com/articles/323886/), such as the flu or [COVID-19](https://www.medicalnewstoday.com/articles/covid-19). Most people get better from these infections with rest, fluids, and fever-reducing medications. However, it is important to take steps to prevent the spread of the infection to protect people who are vulnerable to complications, [such as](https://www.cdc.gov/covid/risk-factors/index.html) older adults and pregnant people. If COVID-19 is a possibility, stay home and seek advice about testing. Sometimes, a fever indicates another type of condition that may require medical treatment. Contact a doctor as soon as possible if a person has a fever along with: - pain anywhere in the body, such as the face, ears, or throat - swelling anywhere in the body - a wound that is inflamed or leaking pus - signs of [sexually transmitted infection](https://www.medicalnewstoday.com/articles/sexually-transmitted-diseases/), such as unusual [discharge from the penis](https://www.medicalnewstoday.com/articles/327228/) or [vagina](https://www.medicalnewstoday.com/articles/322232) - vomiting or diarrhea - symptoms that get progressively worse - symptoms that get better but then come back again ## [When should I worry about a fever?]() Any adult with a temperature over [105\.8°F (41°C)](https://www.ncbi.nlm.nih.gov/books/NBK562334/) should get emergency medical attention. This is known as [hyperpyrexia](https://www.medicalnewstoday.com/articles/318856/), which can have serious consequences if left untreated. People should also seek immediate medical treatment if a person has a fever of any temperature along with: - [sunburn](https://www.medicalnewstoday.com/articles/176441) - chest pain - rapid breathing - difficulty breathing - coughing up pus or blood - a [blue](https://www.medicalnewstoday.com/articles/blue-lips), gray, or white tint to the lips or fingers - a severe headache - an aversion to light - [a severe or worsening rash](https://www.medicalnewstoday.com/articles/324726) - [a stiff neck](https://www.medicalnewstoday.com/articles/meningitis-stiff-neck) - confusion - drowsiness - [loss of consciousness](https://www.medicalnewstoday.com/articles/322872/) - signs of severe [dehydration](https://www.medicalnewstoday.com/articles/153363/), such as a lack of sweat, saliva, or urine - seizures or convulsions Additional signs that a child needs immediate medical attention include: - a fever of any temperature in a child [under 12 weeks old](https://www.cdc.gov/respiratory-viruses/risk-factors/young-children.html) - a fever of 104°F (40°C) or more that does not reduce with medications - a fever that has lasted [5 days or more](https://www.nhs.uk/conditions/fever-in-children/) - sunken eyes, a soft spot on top of a baby’s head, or no tears when crying ## [Causes of fever]() A fever occurs when body temperature increases above its usual “set point”. Often, this is because the immune system is fighting a viral, bacterial, or other type of infection. [Other conditions](https://www.ncbi.nlm.nih.gov/books/NBK562334/) that affect or activate the immune system can also cause fever, such as: - autoimmune conditions, such as [rheumatoid arthritis](https://www.medicalnewstoday.com/articles/323361/) or [lupus](https://www.medicalnewstoday.com/articles/323653) - inflammatory conditions, such as [rheumatic fever](https://www.medicalnewstoday.com/articles/176648) - neurogenic fever, which is when a neurological condition, such as [brain injury](https://www.medicalnewstoday.com/articles/179837/), elevates body temperature - certain cancers - some medications Increases in body temperature from other causes include: - sunburn - [heat exhaustion](https://www.medicalnewstoday.com/articles/319570) - [heatstroke](https://www.medicalnewstoday.com/articles/266551) - some medications »Learn more: [What to know about hyperthermia](https://www.medicalnewstoday.com/articles/320226) ## [Diagnosis]() A fever is a symptom, not an illness. A doctor can diagnose a fever by checking the person’s body temperature, but they will also need to diagnose the reason for the fever. To do so, they will examine the individual and ask about any other symptoms and their medical history. To confirm a diagnosis, the doctor may recommend: - a blood test - a urine test - imaging tests ## [Treatment for a fever]() A fever does not always require treatment. Whether it does depends on its severity and the underlying cause. A doctor may recommend: - Fluids: If a person is [sweating](https://www.medicalnewstoday.com/articles/321663/) a lot, they may experience dehydration. In this case, they should consume [plenty of fluids](https://www.medicalnewstoday.com/articles/306638/) to prevent complications. - Fever-lowering medications: Antipyretics help to lower a person’s temperature. Doctors may recommend these for [a high fever](https://www.medicalnewstoday.com/articles/318856/), but they are not always necessary. Examples include [acetaminophen](https://www.medicalnewstoday.com/articles/drugs-acetaminophen-oral-forms) (Tylenol), [ibuprofen](https://www.medicalnewstoday.com/articles/161071), and [aspirin](https://www.medicalnewstoday.com/articles/161255). Do not give aspirin to children. Always consult a doctor or pharmacist before using over-the-counter fever medications. - Antibiotics: If the fever is due to a [bacterial infection](https://www.medicalnewstoday.com/articles/157973/), a doctor may prescribe an antibiotic. This will not work for viral infections, such as [colds](https://www.medicalnewstoday.com/articles/166606/) or flu. - Other drugs: Doctors may prescribe different types of medication for some viral, [fungal](https://www.medicalnewstoday.com/articles/317970/), or [parasitic infections](https://www.medicalnewstoday.com/articles/220302/). For example, they may prescribe antimalarials for [malaria](https://www.medicalnewstoday.com/articles/150670/). Those with chronic conditions, such as [autoimmune diseases](https://www.medicalnewstoday.com/articles/311852/), may need ongoing treatment with drugs to reduce the symptoms. - Hospital treatment: For severe infections or symptoms, a person may need hospital treatment. Doctors may provide IV fluids, IV antibiotics, equipment to help a person breathe, or other interventions. ## [Fever in children]() Sometimes, young children with a high temperature have [febrile seizures](https://www.medicalnewstoday.com/articles/168010/). This is most likely to occur between the ages of [12 and 18 months](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6052913/). While febrile seizures can be alarming, they often result from [an ear infection](https://www.medicalnewstoday.com/articles/167409/), [gastroenteritis](https://www.medicalnewstoday.com/articles/310481/), or a respiratory virus, and are not usually serious. Still, caregivers should seek medical advice if this occurs and remain watchful for any signs of a more serious infection. Less commonly, febrile seizures may stem from a more severe illness, such as [meningitis](https://www.medicalnewstoday.com/articles/types-of-meningitis/), a [kidney infection](https://www.medicalnewstoday.com/articles/182306/), or pneumonia. There are two types of febrile seizure: ### Simple febrile seizures This type of febrile seizure can last from a few seconds to 15 minutes. However, it usually lasts less than 5 minutes and does not occur again during a 24-hour period. Around [80% to 85%](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6052913/) of febrile seizures are of this type. A simple febrile seizure typically involves the whole body. The symptoms include: - stiffness in the body - twitching in the arms and legs - eyes rolling back - a loss of consciousness while the eyes stay open There may also be: - irregular breathing - urination, defecation, or both - vomiting ### Complex febrile seizures This type of febrile seizure lasts longer than 15 minutes, comes back more often, and tends to affect only a part of the body, rather than the whole body. Complex febrile seizures are more serious than simple febrile seizures. A child who has a complex febrile seizure is more likely to experience [epilepsy](https://www.medicalnewstoday.com/articles/8947/) as they grow older. Around [30% to 40%](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6052913/) of children who have either type of seizure will have other similar seizures at a later date. ### What to do If a child has a febrile seizure: 1. [Check the time](https://www.nhs.uk/conditions/febrile-seizures/) to determine how long the seizure lasts. 2. Protect their head with something soft. 3. Remove any potentially dangerous objects from nearby. 4. Place them on their side in the [recovery position](https://www.medicalnewstoday.com/articles/153849) and check that nothing is obstructing their breathing. During a seizure, do not try to: - hold the child still - put anything in their mouth - give the child a bath to cool them down Next, contact a doctor, call 911, or go to the nearest emergency room. The doctor may suggest managing the child’s temperature with medication and ensuring that the child drinks plenty of fluids. ## [Fever prevention]() To prevent a fever, people can take steps to avoid getting infections. This includes: - washing the hands regularly with soap and water, or using [hand sanitizer](https://www.medicalnewstoday.com/articles/ethanol-hand-sanitizer/) if this is not available - not touching the face with unwashed hands - cleaning and disinfecting surfaces regularly - avoiding close contact with people who are unwell - staying up-to-date with vaccinations ## [Summary]() A fever is usually a symptom of an infection. It is not usually a cause for concern, but the underlying illness may need medical treatment. Often, a fever will resolve without medical attention. However, if a child or an older adult has a fever, if the individual has other severe or worsening symptoms, or if they have [a weakened immune system](https://www.medicalnewstoday.com/articles/324930/), they should seek medical help. [Read the article in Spanish](https://www.medicalnewstoday.com/articles/es/fiebre). - [Public Health](https://www.medicalnewstoday.com/categories/public-health) - [Infectious Diseases / Bacteria / Viruses](https://www.medicalnewstoday.com/categories/infectious_diseases) - [Pediatrics / Children's Health](https://www.medicalnewstoday.com/categories/pediatrics) ### How we reviewed this article: Sources Medical News Today has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical journals and associations. We only use quality, credible sources to ensure content accuracy and integrity. You can learn more about how we ensure our content is accurate and current by reading our [editorial policy](https://www.medicalnewstoday.com/articles/process). - Balli S, et al. (2023). Physiology, fever. <https://www.ncbi.nlm.nih.gov/books/NBK562334/> - Febrile seizures. (2023). <https://www.nhs.uk/conditions/febrile-seizures/> - High temperature (fever) in adults. (2023). <https://www.nhs.uk/conditions/fever-in-adults/> - High temperature (fever) in children. (2024). <https://www.nhs.uk/conditions/fever-in-children/> - Leung AKC, et al. (2018). Febrile seizures: An overview. <https://pmc.ncbi.nlm.nih.gov/articles/PMC6052913/> - People with certain medical conditions and COVID-19 risk factors. (2025). <https://www.cdc.gov/covid/risk-factors/index.html> - Respiratory viruses and young children. (2024). <https://www.cdc.gov/respiratory-viruses/risk-factors/young-children.html> Share this article ![](https://i0.wp.com/post.medicalnewstoday.com/wp-content/uploads/2022/01/Mia-Armstrong-500x500-Bio.png?w=105&h=105) [Medically reviewed]() by [Mia Armstrong, MD]() — Written by [Yvette Brazier]() — [Updated on May 30, 2025]() ## Latest news - [9 steps to improve heart health, per new dietary guidance from AHA](https://www.medicalnewstoday.com/articles/9-steps-improve-heart-health-diet-guidance-aha) - [AI model can accurately predict liver cancer risk, study suggests](https://www.medicalnewstoday.com/articles/ai-model-accurately-predict-liver-cancer-risk) - [AI-powered stroke tool linked to improved patient outcomes in large clinical trial](https://www.medicalnewstoday.com/articles/ai-powered-stroke-tool-linked-improved-patient-outcomes-large-clinical-trial) - [Eating same meals on repeat, and more at weekends may help you lose more weight](https://www.medicalnewstoday.com/articles/eating-same-meals-repeat-more-weekends-may-help-lose-more-weight) - [Cooking at least one meal at home weekly may cut dementia risk by up to 67%](https://www.medicalnewstoday.com/articles/cooking-at-least-one-meal-at-home-weekly-may-cut-dementia-risk) © 2026 Healthline Media UK Ltd, London, UK. 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Readable Markdown	If an adult’s body temperature rises above the typical range of 98 to 100°F (36 to 38°C), they may have a fever. This is a common sign of an infection. When an infection occurs, the immune system will launch an attack to try to remove the cause. A high body temperature is sometimes part of this reaction. As a person’s body temperature increases, they may feel cold until it levels off and stops rising. People describe this as “chills.” Read on to learn more about the symptoms of a fever, as well as some causes and treatment options. A fever is a higher-than-typical body temperature that occurs as part of the immune response. A person [may have](https://www.nhs.uk/conditions/fever-in-adults/) a fever if: - their chest or back feels hotter than usual - their skin is [clammy](https://www.medicalnewstoday.com/articles/322446/) to the touch - they feel hot and sweaty, [shivery and cold](https://www.medicalnewstoday.com/articles/chills), or both - they have [flushed](https://www.medicalnewstoday.com/articles/323219/) skin Depending on the cause, people may also have other symptoms such as: - fatigue - a general feeling of being unwell ([malaise](https://www.medicalnewstoday.com/articles/327062)) - a [cough](https://www.medicalnewstoday.com/articles/327142) - a [stuffy](https://www.medicalnewstoday.com/articles/nasal-congestion/) or [runny](https://www.medicalnewstoday.com/articles/325248/) nose Fever is distinct from temporary rises in body temperature due to other factors, such as exercise or hot weather. People can test for fever at home by using a digital thermometer. To [use one](https://www.nhs.uk/common-health-questions/accidents-first-aid-and-treatments/how-do-i-take-someones-temperature/): 1. Clean the tip using cold water and soap, and then rinse it. 2. Turn on the device. 3. Place the tip under the tongue, toward the back of the mouth, and close the mouth. 4. Wait until there is a flash or the thermometer beeps. 5. Read the temperature. If the reading is 100.4°F (38°C) or above, the person may have a fever. People can also use digital thermometers under the armpit. However, be aware that a typical armpit temperature will be around 0.5 to 0.9ºF (0.3 to 0.5°C) lower than oral temperature. Ear thermometers are also available, but they can require precise positioning for an accurate result. Digital thermometers are one of the safest methods for measuring body temperature at home. Glass thermometers can be dangerous if they break, and forehead strips are not accurate. People should not use these methods. In many cases, the cause of a fever is a [respiratory infection](https://www.medicalnewstoday.com/articles/323886/), such as the flu or [COVID-19](https://www.medicalnewstoday.com/articles/covid-19). Most people get better from these infections with rest, fluids, and fever-reducing medications. However, it is important to take steps to prevent the spread of the infection to protect people who are vulnerable to complications, [such as](https://www.cdc.gov/covid/risk-factors/index.html) older adults and pregnant people. If COVID-19 is a possibility, stay home and seek advice about testing. Sometimes, a fever indicates another type of condition that may require medical treatment. Contact a doctor as soon as possible if a person has a fever along with: - pain anywhere in the body, such as the face, ears, or throat - swelling anywhere in the body - a wound that is inflamed or leaking pus - signs of [sexually transmitted infection](https://www.medicalnewstoday.com/articles/sexually-transmitted-diseases/), such as unusual [discharge from the penis](https://www.medicalnewstoday.com/articles/327228/) or [vagina](https://www.medicalnewstoday.com/articles/322232) - vomiting or diarrhea - symptoms that get progressively worse - symptoms that get better but then come back again Any adult with a temperature over [105\.8°F (41°C)](https://www.ncbi.nlm.nih.gov/books/NBK562334/) should get emergency medical attention. This is known as [hyperpyrexia](https://www.medicalnewstoday.com/articles/318856/), which can have serious consequences if left untreated. People should also seek immediate medical treatment if a person has a fever of any temperature along with: - [sunburn](https://www.medicalnewstoday.com/articles/176441) - chest pain - rapid breathing - difficulty breathing - coughing up pus or blood - a [blue](https://www.medicalnewstoday.com/articles/blue-lips), gray, or white tint to the lips or fingers - a severe headache - an aversion to light - [a severe or worsening rash](https://www.medicalnewstoday.com/articles/324726) - [a stiff neck](https://www.medicalnewstoday.com/articles/meningitis-stiff-neck) - confusion - drowsiness - [loss of consciousness](https://www.medicalnewstoday.com/articles/322872/) - signs of severe [dehydration](https://www.medicalnewstoday.com/articles/153363/), such as a lack of sweat, saliva, or urine - seizures or convulsions Additional signs that a child needs immediate medical attention include: - a fever of any temperature in a child [under 12 weeks old](https://www.cdc.gov/respiratory-viruses/risk-factors/young-children.html) - a fever of 104°F (40°C) or more that does not reduce with medications - a fever that has lasted [5 days or more](https://www.nhs.uk/conditions/fever-in-children/) - sunken eyes, a soft spot on top of a baby’s head, or no tears when crying A fever occurs when body temperature increases above its usual “set point”. Often, this is because the immune system is fighting a viral, bacterial, or other type of infection. [Other conditions](https://www.ncbi.nlm.nih.gov/books/NBK562334/) that affect or activate the immune system can also cause fever, such as: - autoimmune conditions, such as [rheumatoid arthritis](https://www.medicalnewstoday.com/articles/323361/) or [lupus](https://www.medicalnewstoday.com/articles/323653) - inflammatory conditions, such as [rheumatic fever](https://www.medicalnewstoday.com/articles/176648) - neurogenic fever, which is when a neurological condition, such as [brain injury](https://www.medicalnewstoday.com/articles/179837/), elevates body temperature - certain cancers - some medications Increases in body temperature from other causes include: - sunburn - [heat exhaustion](https://www.medicalnewstoday.com/articles/319570) - [heatstroke](https://www.medicalnewstoday.com/articles/266551) - some medications A fever is a symptom, not an illness. A doctor can diagnose a fever by checking the person’s body temperature, but they will also need to diagnose the reason for the fever. To do so, they will examine the individual and ask about any other symptoms and their medical history. To confirm a diagnosis, the doctor may recommend: - a blood test - a urine test - imaging tests A fever does not always require treatment. Whether it does depends on its severity and the underlying cause. A doctor may recommend: - Fluids: If a person is [sweating](https://www.medicalnewstoday.com/articles/321663/) a lot, they may experience dehydration. In this case, they should consume [plenty of fluids](https://www.medicalnewstoday.com/articles/306638/) to prevent complications. - Fever-lowering medications: Antipyretics help to lower a person’s temperature. Doctors may recommend these for [a high fever](https://www.medicalnewstoday.com/articles/318856/), but they are not always necessary. Examples include [acetaminophen](https://www.medicalnewstoday.com/articles/drugs-acetaminophen-oral-forms) (Tylenol), [ibuprofen](https://www.medicalnewstoday.com/articles/161071), and [aspirin](https://www.medicalnewstoday.com/articles/161255). Do not give aspirin to children. Always consult a doctor or pharmacist before using over-the-counter fever medications. - Antibiotics: If the fever is due to a [bacterial infection](https://www.medicalnewstoday.com/articles/157973/), a doctor may prescribe an antibiotic. This will not work for viral infections, such as [colds](https://www.medicalnewstoday.com/articles/166606/) or flu. - Other drugs: Doctors may prescribe different types of medication for some viral, [fungal](https://www.medicalnewstoday.com/articles/317970/), or [parasitic infections](https://www.medicalnewstoday.com/articles/220302/). For example, they may prescribe antimalarials for [malaria](https://www.medicalnewstoday.com/articles/150670/). Those with chronic conditions, such as [autoimmune diseases](https://www.medicalnewstoday.com/articles/311852/), may need ongoing treatment with drugs to reduce the symptoms. - Hospital treatment: For severe infections or symptoms, a person may need hospital treatment. Doctors may provide IV fluids, IV antibiotics, equipment to help a person breathe, or other interventions. Sometimes, young children with a high temperature have [febrile seizures](https://www.medicalnewstoday.com/articles/168010/). This is most likely to occur between the ages of [12 and 18 months](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6052913/). While febrile seizures can be alarming, they often result from [an ear infection](https://www.medicalnewstoday.com/articles/167409/), [gastroenteritis](https://www.medicalnewstoday.com/articles/310481/), or a respiratory virus, and are not usually serious. Still, caregivers should seek medical advice if this occurs and remain watchful for any signs of a more serious infection. Less commonly, febrile seizures may stem from a more severe illness, such as [meningitis](https://www.medicalnewstoday.com/articles/types-of-meningitis/), a [kidney infection](https://www.medicalnewstoday.com/articles/182306/), or pneumonia. There are two types of febrile seizure: Simple febrile seizures This type of febrile seizure can last from a few seconds to 15 minutes. However, it usually lasts less than 5 minutes and does not occur again during a 24-hour period. Around [80% to 85%](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6052913/) of febrile seizures are of this type. A simple febrile seizure typically involves the whole body. The symptoms include: - stiffness in the body - twitching in the arms and legs - eyes rolling back - a loss of consciousness while the eyes stay open There may also be: - irregular breathing - urination, defecation, or both - vomiting Complex febrile seizures This type of febrile seizure lasts longer than 15 minutes, comes back more often, and tends to affect only a part of the body, rather than the whole body. Complex febrile seizures are more serious than simple febrile seizures. A child who has a complex febrile seizure is more likely to experience [epilepsy](https://www.medicalnewstoday.com/articles/8947/) as they grow older. Around [30% to 40%](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6052913/) of children who have either type of seizure will have other similar seizures at a later date. What to do If a child has a febrile seizure: 1. [Check the time](https://www.nhs.uk/conditions/febrile-seizures/) to determine how long the seizure lasts. 2. Protect their head with something soft. 3. Remove any potentially dangerous objects from nearby. 4. Place them on their side in the [recovery position](https://www.medicalnewstoday.com/articles/153849) and check that nothing is obstructing their breathing. During a seizure, do not try to: - hold the child still - put anything in their mouth - give the child a bath to cool them down Next, contact a doctor, call 911, or go to the nearest emergency room. The doctor may suggest managing the child’s temperature with medication and ensuring that the child drinks plenty of fluids. To prevent a fever, people can take steps to avoid getting infections. This includes: - washing the hands regularly with soap and water, or using [hand sanitizer](https://www.medicalnewstoday.com/articles/ethanol-hand-sanitizer/) if this is not available - not touching the face with unwashed hands - cleaning and disinfecting surfaces regularly - avoiding close contact with people who are unwell - staying up-to-date with vaccinations A fever is usually a symptom of an infection. It is not usually a cause for concern, but the underlying illness may need medical treatment. Often, a fever will resolve without medical attention. However, if a child or an older adult has a fever, if the individual has other severe or worsening symptoms, or if they have [a weakened immune system](https://www.medicalnewstoday.com/articles/324930/), they should seek medical help.
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